Re: Commodore PLC TIB DD-001 / Drive 2001

From: Mia Magnusson <mia_at_plea.se>
Date: Thu, 24 May 2018 01:59:55 +0200
Message-ID: <20180524015955.000072c3@plea.se>
Den Wed, 23 May 2018 19:53:05 +0100 skrev smf <smf@null.net>:
> On 22/05/2018 13:04, Mia Magnusson wrote:
> 
> > No, both a CF card and a FDC shows up as a few 8-bit registers,
> 
> Technically CF is 16 bit, although some cards support switching to 8
> bit transfers. I don't know how well that works in practise.

Afaik that is a part of the CF standard and shouldn't cause any
problems with most cards.

> The XTIDE adapters work round it by using a buffer for the other 8
> bits, converting that hardware to a PET should be pretty easy & any
> parallel ATA (or technically a SATA with an adapter) will work.

But not worth the effort with a mechanical disk, as even only using
half the capacity will be enough for any disk you'll find in the junk
box.

> You might want to get it working with PIO before trying DMA, because 
> that is a whole new world of pain.

You will not gain anything by using the various "DMA" modes on an
IDE/CF disk with a 1MHz 6502 system as the disk is faster than the
computer even in the disks slowest mode.

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Received on 2018-05-24 02:01:56

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